This is a micro-plugin for the Vim editor. It translates
key codes for shifted function keys (e.g. Shift + F1) into key names that can
be used in a mapping. For details, see :help set-termcap.
Note: whether this plugin will be useful to you or not depends on your terminal emulator, termcap configuration etc. It is possible that your Linux / Vim distribution ships with these key codes already defined.
Source: Table of function-keys for XTerm and other Terminal Emulators